How Land Slide Upsc?

How does land slide happen?

Landslides are caused by disturbances in the natural stability of a slope. They can accompany heavy rains or follow droughts, earthquakes, or volcanic eruptions. Mudslides develop when water rapidly accumulates in the ground and results in a surge of water-saturated rock, earth, and debris.

How do you define a land slide?

A landslide is defined as the movement of a mass of rock, debris, or earth down a slope. Landslides are a type of “mass wasting,” which denotes any down-slope movement of soil and rock under the direct influence of gravity.

Who is responsible for land slide?

Most of the landslides are triggered by rain. Intense rainfall, along with many other factors can cause slope saturation, which is a primary cause of landslides. High amount of rainfall and long duration are responsible for landslides, and are also related to debris flow.

What are the 4 types of landslides?

falls. topples. slides (rotational and translational) flows.

How do land slides and earthquakes occur?

Triggering events such as earthquakes, heavy rain, or upsetting the inclined surface through digging can help to initiate a landslide, but gravity is always the primary force that enables any landslide to occur, regardless of how that landslide was triggered.

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How does landslide become man made?

Many human-caused landslides can be avoided or mitigated. They are commonly a result of building roads and structures without adequate grading of slopes, poorly planned alteration of drainage patterns, and disturbing old landslides.

How do you identify a land slide?

Water breaks through the ground surface in new locations. Fences, retaining walls, utility poles, or trees tilt or move. A faint rumbling sound that increases in volume is noticeable as the landslide nears. Unusual sounds, such as trees cracking or boulders knocking together, might indicate moving debris.

What are the 5 causes of landslide?

Deforestation. Landslides due to human intervention is one of the causes of landslides in India. Shifting Cultivation. Shifting cultivation is common in hilly regions and Northeast areas. Heavy Rainfall and Earthquakes. Mining. Urbanisation.

What is landslide and its types?

Landslides are generally classified by type of movement (slides, flows, spreads, topples, or falls) and type of material (rock, debris, or earth). Sometimes more than one type of movement occurs within a single landslide, and analysis of each requires detailed interpretation of landforms and geological sections.

How do you control land slides?

There are also various direct methods of preventing landslides; these include modifying slope geometry, using chemical agents to reinforce slope material, installing structures such as piles and retaining walls, grouting rock joints and fissures, diverting debris pathways, and rerouting surface and underwater drainage.